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Video Converter, Rotate and Crop

To change only the container, the picture and sound are copied as they are, so the quality stays the same and it is quick. MP4 and MOV can store the rotation without changing the picture. To make a wide video vertical (9:16), fit it with a blurred background or black bars. Your file is never uploaded.

On-device・No uploadLimited on mobileWorks offline

Your files and input are processed only inside your browser on this device and are never uploaded to our servers.

Drop a video

or

Choose one video (MP4, MOV, WebM, MKV and so on). Limits depend on the device: 2 GB and 4 hours on a PC.Accepts: MP4 / M4V / MOV / WEBM / MKVPaste (Ctrl+V) also works

How to use

  1. clip.movlandscape

    Add a video

  2. clip.mp4rotated to 9:16 portrait

    Choose format, rotation, crop

  3. clip.webmcopied if format is same

    Convert and check the result

Change a video format, rotate or crop it, and save

  1. Drop a video or click “Choose file”. You can also try “Try the sample” first.

  2. Choose the output format (MP4, MOV or WebM; only the ones this browser can write are listed). Choose the rotation or mirror if you need one.

  3. Drag the box on the preview, or type its numbers, to choose the area to keep. An aspect ratio such as 9:16 keeps the box at that ratio.

  4. Click “Convert”, play the result to check it, then save.

What it does

Same quality when only the format changes

When the video codec is the same and the picture is not changed, the video is copied without re-encoding. MOV to MP4 is quick and keeps the quality.

Rotation written as information

MP4 and MOV can store the rotation as file information instead of changing the pixels, so the picture is kept and only the direction changes.

Vertical with a blurred background

Fit a wide video into 9:16 or 1:1 with a blurred background or black bars. The output frame is 1080 pixels on the short side.

Crop on the preview

Drag the box, or type the left, top, width and height. With an aspect ratio, the box keeps that ratio.

Check before you save

Shows the length, size and video codec of the result, and lets you play it in the browser first.

Use cases

  • Change an iPhone MOV to an MP4 that plays on most devices
  • Turn a video that was recorded sideways the right way up
  • Make a wide video 9:16 for a short-video post
  • Cut the unwanted edges off a video and save it as WebM

Supported formats

Input

Video: MP4, MOV, WebM, MKV and so on (what the browser can read)

Output

MP4 (H.264, AAC): only in browsers that can write H.264MOV (H.264, AAC): only in browsers that can write H.264WebM (VP8 or VP9, Opus): only in browsers that can write VP8 or VP9

Capability matrix

FeatureSupportNotes
Converting between MP4, MOV and WebM (copied when the codec is the same)Supported—
Rotation by 90°, 180° and 270° (MP4 and MOV can change only the information)Supported—
Rotating WebMSupportedWebM cannot hold rotation information, so the pixels are turned (re-encoded)
Mirroring left-right or top-bottomSupportedChanges the pixels, so the video is re-encoded
Cropping (drag, numbers, a fixed aspect ratio)Supported—
Vertical frames (9:16 fit, blurred background, black bars)SupportedOutput: 9:16 at 1080×1920, 1:1 at 1080×1080, 4:5 at 1080×1350, 16:9 at 1920×1080
Writing MP4 and MOVPartialOnly in browsers with an H.264 encoder (checked in Chrome)
Writing WebMPartialOnly in browsers with a VP8 or VP9 encoder
Text, filters and effectsNot supported—
Changing the speed, or cutting part of a videoNot supportedNot handled on this screen
Keeping every audio track of a videoNot supportedOnly the first audio track is kept
DRM (encrypted) videoNot supportedCannot be read
Keeping tags (capture date, location and so on)Not supportedThe output has no tags

Limits & notes

  • Up to 2 GB, 4 hours and 4K (3840×2160) per file on a PC. Phones: 300 MB and 1 hour.
  • A re-encoded output that would be too large (for example a 1-hour 1080p vertical video) is refused before conversion starts.
  • Speed depends on the device. A blurred background takes longer on a long video.
  • Damaged files, or formats that are not supported (DRM, unusual codecs), cannot be read.

Privacy & safety

Reading, converting and saving all happen in your browser. The file is never sent to a server.

FAQ

How do I convert MOV to MP4?
Choose the video, choose MP4 as the output format and click “Convert”. If the video and audio codecs are the same, they are copied without re-encoding, so the quality does not change.
How do I make a wide video vertical (9:16)?
Choose 9:16 as the aspect ratio, then “Fit with a blurred background” or “Fit with black bars”. To only crop, choose “Crop”.
Does rotating lower the quality?
MP4 and MOV only change the rotation information, so the picture is unchanged. WebM cannot store rotation information, so its pixels are turned and the video is re-encoded.
Is my video uploaded?
No. Everything is processed in your browser and nothing is sent to a server.
Why is MP4 not in the list?
MP4 and MOV can only be written in browsers with an H.264 encoder. If they are not listed, choose WebM or try Chrome or Edge.

Video Compress

To make a video smaller, choose the video and a quality preset (High, Medium or Small). Resolution, frame rate and bitrates can be changed one by one. Compare the size, resolution and playback before and after; the file is never uploaded.

No upload

Video Trim and Join

To keep only part of a video, set the start and end on the timeline and press “Add this part”. Put the parts in any order and save them as one video. Videos of the same format keep their quality.

No upload

Audio Converter and Video Audio Extractor

To get just the sound from a video, choose the video and an output format (MP3, M4A, WAV, Opus or FLAC). If the source audio is AAC, M4A is written without re-encoding, so the quality does not change. Your file is never uploaded.

No upload

Video Target Size

To bring a video close to a set size, choose the video and a target (8, 10, 25, 50 or 100 MB, or a custom size). The bitrate is calculated from the target, and if the result is over, it is lowered and tried again. The file is never uploaded.

No upload

GIF Maker

To make a GIF from part of a video, choose “From video”, set the start and end, pick a frame rate and size, and press “Make the GIF”. To join several images, choose “From images”. You can check the GIF in a preview before you save it.

No upload

Screen Recorder

Record a screen, window or tab, your webcam and microphone without installing anything. Add a camera overlay or mix mic and tab audio. Recordings stay inside this device and are never uploaded.

No upload

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